CN210889936U - Planetary gear speed reducing mechanism - Google Patents
Planetary gear speed reducing mechanism Download PDFInfo
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- CN210889936U CN210889936U CN201921793239.3U CN201921793239U CN210889936U CN 210889936 U CN210889936 U CN 210889936U CN 201921793239 U CN201921793239 U CN 201921793239U CN 210889936 U CN210889936 U CN 210889936U
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Abstract
The utility model provides a planetary gear reduction gears. Planetary gear reduction unit includes one-level, second grade and tertiary planetary gear assembly, and planetary gear reduction unit still includes: the plurality of first-stage planetary gears and the plurality of second-stage planetary gears are meshed with the first inner gear ring; the first-stage planetary gear assembly comprises a first sun gear and a first-stage planetary disk, the first sun gear is meshed with the plurality of first-stage planetary gears to drive the first-stage planetary gears to rotate, and the first-stage planetary gears are arranged on the first-stage planetary disk; the secondary planetary gear assembly comprises a second sun gear and a second-stage planetary disk for mounting the second-stage planetary gear, and the first-stage planetary disk is fixedly connected with the second sun gear so as to drive the second sun gear to rotate; the third-stage planetary gear assembly comprises a third sun gear and a third-stage planet carrier, and the third sun gear is fixed with the second-stage planet disk. The utility model provides an assembly required precision of planetary reducer require higher problem among the prior art.
Description
Technical Field
The utility model relates to a gear drive technical field particularly, relates to a planetary gear reduction gears.
Background
At present, the planetary reducer has the advantages of high transmission efficiency, stable motion, strong impact resistance and vibration resistance and the like, and belongs to common transmission equipment for low rotating speed and large torque.
However, in the prior art, the first-stage planetary disk and the second-stage planetary disk are fixed through the transmission gear shaft, so that the assembly precision requirement of the planetary reducer is high, the assembly period of the planetary reducer is prolonged, and the labor intensity of workers is increased.
SUMMERY OF THE UTILITY MODEL
A primary object of the utility model is to provide a planetary gear reduction to it is higher to solve planetary gear reducer's among the prior art assembly required precision, has increased staff intensity of labour's problem.
In order to achieve the above object, the utility model provides a planetary gear reduction mechanism, including one-level planetary gear assembly, second grade planetary gear assembly and tertiary planetary gear assembly, planetary gear reduction mechanism still includes: the first inner gear ring, the plurality of first-stage planetary gears of the first-stage planetary gear assembly and the plurality of second-stage planetary gears of the second-stage planetary gear assembly are all meshed with the first inner gear ring; the first-stage planetary gear assembly comprises a first sun gear and a first-stage planetary disk, the first sun gear is meshed with the plurality of first-stage planetary gears to drive the first-stage planetary gears to rotate, and the first-stage planetary gears are pivotally arranged on the first-stage planetary disk; the secondary planetary gear assembly comprises a second sun gear and a secondary planetary disk, the second sun gear is fixedly connected with the primary planetary disk, the primary planetary disk drives the second sun gear to rotate, the second sun gear is meshed with the plurality of secondary planetary gears to drive the secondary planetary gears to rotate, and the secondary planetary gears are pivotally arranged on the secondary planetary disk; the third-stage planetary gear assembly comprises a third sun gear and a third-stage planet carrier, the third sun gear is fixedly connected with a second-stage planet disk, and the second-stage planet disk drives the third sun gear to rotate.
Furthermore, the primary planetary gear assembly, the secondary planetary gear assembly and the tertiary planetary gear assembly are sequentially arranged at intervals along the height direction of the planetary gear speed reducing mechanism, and the primary planetary disk is positioned in the first inner gear ring and positioned between the adjacent primary planetary gear and the second planetary gear.
Further, the third stage planet carrier has a first recess, and the second stage planet carrier is located in the first recess.
Further, the planetary gear reduction mechanism further includes: and the power of the planetary gear speed reducing mechanism is output through the output structure.
Further, the three-stage planetary gear assembly further includes a plurality of third-stage planetary gears, and the planetary gear reduction mechanism further includes: the plurality of third-stage planetary gears are meshed with the second inner gear ring, and the second inner gear ring is connected with the first inner gear ring; and the first bearing structure is positioned between the third-stage planet carrier and the second inner gear ring so as to support the third-stage planet carrier.
Further, the planetary gear reduction mechanism further includes: and the second bearing structure is positioned between the second inner gear ring and the output structure so as to support the output structure.
Furthermore, the third-stage planet carrier is also provided with a second concave part, a first mounting cavity is formed between the second concave part and the second inner gear ring, and the first bearing structure is positioned in the first mounting cavity; the output structure is provided with a third concave part, a second mounting cavity is formed between the second concave part and the second inner gear ring, and the second bearing structure is located in the second mounting cavity.
Furthermore, the first bearing structure comprises a plurality of groups of first roller pairs, and the plurality of groups of first roller pairs are arranged at intervals along the circumferential direction of the second inner gear ring; each set of the first roller pairs includes a first sub roller extending in an axial direction of the second ring gear and a second sub roller extending in a radial direction of the second ring gear.
Further, the second bearing structure comprises a plurality of groups of second roller pairs, the plurality of groups of second roller pairs are arranged along the circumferential direction of the second inner gear ring at intervals, each group of second roller pairs comprises a third sub roller and a fourth sub roller, the third sub roller extends along the axial direction of the second inner gear ring, and the fourth sub roller extends along the radial direction of the second inner gear ring.
Furthermore, the first-stage planetary plate is provided with a first mounting hole, the inner surface of the first mounting hole is provided with a first toothed part, the second sun gear penetrates through the first mounting hole, and the toothed part of the second sun gear is attached to the first toothed part; the second-stage planetary disc is provided with a second mounting hole, the inner surface of the second mounting hole is provided with a second toothed portion, the third sun gear penetrates through the second mounting hole, and the toothed portion of the third sun gear is attached to the second toothed portion.
Use the technical scheme of the utility model, power take off end is connected with first sun gear to drive first sun gear and rotate, first sun gear all meshes with a plurality of first order planetary gear, rotates with driving each first order planetary gear. Each first-stage planetary gear can be pivotally arranged on the first-stage planetary disc, and in the process that each first-stage planetary gear rotates along the first inner gear ring, the plurality of first-stage planetary gears drive the first-stage planetary discs to rotate, and the first-stage planetary discs are fixedly connected with the second sun gear and drive the second sun gear to rotate. The second sun gear is meshed with the plurality of second-stage planetary gears to drive the second-stage planetary gears to rotate. Each second-stage planetary gear can be pivotally arranged on the second-stage planetary disc to drive the second-stage planetary disc to rotate, and the second-stage planetary disc is fixedly connected with the third sun gear and drives the third sun gear to rotate. Therefore, in the running process of the planetary gear speed reducing mechanism, the first-stage planetary disk is limited only by the second sun gear in the radial direction, the second-stage planetary disk is limited only by the third sun gear in the radial direction, after the assembly of the planetary gear speed reducing mechanism is completed, the first-stage planetary disk and the second-stage planetary disk are limited in the axial direction through the stacking of the baffle cover, the first-stage planetary gear, the second-stage planetary gear and the third-stage planetary disk, and then the floating installation of the first-stage planetary disk and the second-stage planetary disk is realized, so that the assembly of the planetary gear speed reducing mechanism is easier and simpler, the problem that the assembly precision requirement of a planetary speed reducer in the prior art is higher is further solved, the labor intensity of workers is increased, and the assembly period of the planetary gear speed reducer is shortened. Meanwhile, the first-stage planetary gear and the second-stage planetary gear are meshed with the first inner gear ring, namely the first inner gear ring and the second inner gear ring share the first inner gear ring, so that the overall height of the planetary gear speed reducing mechanism is reduced, and the miniaturization design is realized.
Drawings
The accompanying drawings, which form a part of the present application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:
figure 1 shows an exploded view of an embodiment of a planetary gear reduction mechanism according to the present invention;
fig. 2 shows an enlarged schematic view at a of the planetary gear reduction mechanism in fig. 1;
fig. 3 shows an enlarged schematic view at B of the planetary gear reduction mechanism in fig. 1;
FIG. 4 shows a cross-sectional view of the planetary gear reduction mechanism of FIG. 1; and
fig. 5 shows an enlarged schematic view at C of the planetary gear reduction mechanism in fig. 4.
Wherein the figures include the following reference numerals:
10. a primary planetary gear assembly; 11. a first stage planetary gear; 12. a first stage of planetary discs; 121. a first tooth-shaped portion; 20. a secondary planetary gear assembly; 21. a second stage planetary gear; 22. a second sun gear; 23. a second stage of planetary discs; 231. a second toothed portion; 30. a third-stage planetary gear assembly; 31. a third sun gear; 32. a third stage planet carrier; 321. a first recess; 322. a second recess; 33. a third stage planetary gear; 40. a first ring gear; 50. an output structure; 51. a third recess; 60. a second ring gear; 70. a first bearing structure; 71. a first sub roller; 72. a second sub roller; 80. a second bearing structure; 81. a third sub roller; 82. a fourth sub roller; 90. oil sealing; 100. and (7) blocking the cover.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
It is noted that, unless otherwise indicated, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
In the present invention, unless otherwise specified, the use of directional words such as "upper and lower" is generally in reference to the orientation shown in the drawings, or to the vertical, perpendicular or gravitational orientation; likewise, for ease of understanding and description, "left and right" are generally to the left and right as shown in the drawings; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself, but the above directional terms are not intended to limit the present invention.
In order to solve among the prior art planetary reducer's assembly precision requirement higher, increased staff intensity of labour's problem, this application provides a planetary gear reduction mechanism.
As shown in fig. 1 and 4, the planetary gear reduction mechanism includes a primary planetary gear assembly 10, a secondary planetary gear assembly 20, and a tertiary planetary gear assembly 30, and further includes a first ring gear 40. Wherein, the three first-stage planetary gears 11 of the first-stage planetary gear assembly 10 and the three second-stage planetary gears 21 of the second-stage planetary gear assembly 20 are all meshed with the first ring gear 40. The first-stage planetary gear assembly 10 comprises a first sun gear and a first-stage planetary disk 12, the first sun gear is meshed with three first-stage planetary gears 11 to drive each first-stage planetary gear 11 to rotate, and each first-stage planetary gear 11 can be pivotally mounted on the first-stage planetary disk 12. The secondary planetary gear assembly 20 comprises a second sun gear 22 and a second-stage planetary disk 23, the second sun gear 22 is fixedly connected with the first-stage planetary disk 12, the first-stage planetary disk 12 drives the second sun gear 22 to rotate, the second sun gear 22 is meshed with three second-stage planetary gears 21 to drive the second-stage planetary gears 21 to rotate, and the second-stage planetary gears 21 are pivotally mounted on the second-stage planetary disk 23. The third planetary gear assembly 30 includes a third sun gear 31 and a third planetary carrier 32, the third sun gear 31 is fixedly connected to the second planetary plate 23, and the second planetary plate 23 drives the third sun gear 31 to rotate.
By using the technical scheme of the embodiment, the power output end is connected with the first sun gear to drive the first sun gear to rotate, and the first sun gear is meshed with the three first-stage planetary gears 11 to drive the first-stage planetary gears 11 to rotate. Each first-stage planetary gear 11 is pivotally mounted on the first-stage planetary disk 12, and in the process that each first-stage planetary gear 11 rotates along the first inner gear ring 40, the three first-stage planetary gears 11 drive the first-stage planetary disk 12 to rotate, and the first-stage planetary disk 12 is fixedly connected with the second sun gear 22 and drives the second sun gear 22 to rotate. The second sun gear 22 is engaged with all of the three second-stage planetary gears 21 to rotate each of the second-stage planetary gears 21. Each second-stage planetary gear 21 can be pivotally mounted on the second-stage planetary disk 23 to drive the second-stage planetary disk 23 to rotate, and the second-stage planetary disk 23 is fixedly connected with the third sun gear 31 and drives the third sun gear 31 to rotate. Therefore, in the operation process of the planetary gear speed reducing mechanism, the first-stage planetary disk 12 is limited only by the second sun gear 22 in the radial direction, the second-stage planetary disk 23 is limited only by the third sun gear 31 in the radial direction, after the assembly of the planetary gear speed reducing mechanism is completed, the first-stage planetary disk 12 and the second-stage planetary disk 23 are limited in the axial direction by stacking the baffle cover 100, the first-stage planetary gear 11, the second-stage planetary gear 21 and the third-stage planetary disk 32, and then the floating installation of the first-stage planetary disk 12 and the second-stage planetary disk 23 is realized, so that the assembly of the planetary gear speed reducing mechanism is easier and simpler, the problems that the assembly precision requirement of a planetary speed reducer in the prior art is higher, the labor intensity of workers is increased, and the assembly period of the planetary gear speed reducer is shortened are solved. Meanwhile, the first-stage planetary gear 11 and the second-stage planetary gear 21 are both meshed with the first inner gear ring 40, namely the first-stage planetary gear and the second-stage planetary gear share the first inner gear ring 40, so that the overall height of the planetary gear speed reducing mechanism is reduced, and the miniaturization design is realized.
As shown in fig. 4, the primary planetary gear assembly 10, the secondary planetary gear assembly 20 and the tertiary planetary gear assembly 30 are sequentially arranged at intervals in the height direction of the planetary gear speed reducing mechanism, and the primary planetary disk 12 is located in the first ring gear 40 and between the adjacent primary planetary gear 11 and the adjacent secondary planetary gear 21. Specifically, the height direction of the planetary gear speed reduction mechanism is the thickness direction thereof. Along the height direction of the planetary gear speed reducing mechanism, the first-stage planetary disk 12 is positioned between the three first-stage planetary gears 11 and the three second-stage planetary gears 21, so that the internal structure of the planetary gear speed reducing mechanism is more compact, and the height (or the thickness) of the planetary gear speed reducing mechanism is further reduced.
In the present embodiment, the height direction of the planetary gear reduction mechanism coincides with the axial direction of the first ring gear 40.
As shown in fig. 4, the third stage carrier 32 has a first recess 321, and the second stage carrier disk 23 is located in the first recess 321. Therefore, the arrangement makes the internal structure of the planetary gear speed reducing mechanism more compact, further reduces the overall height of the planetary gear speed reducing mechanism, and realizes the miniaturization design of the planetary gear speed reducing mechanism.
As shown in fig. 1 and 4, the planetary gear reduction mechanism further includes an output structure 50. Wherein, the third stage planet carrier 32 is connected with the output structure 50 through a fastener, and the power of the planetary gear speed reducing mechanism is output through the output structure 50. In this way, the power of the planetary gear speed reduction mechanism is output through the output structure 50, and the purpose of speed reduction is further achieved.
Optionally, the fastener is a screw or bolt. The connection manner of the third-stage carrier 32 and the output structure 50 is not limited to this. Optionally, the third stage planet carrier 32 is clamped, or bonded, or welded to the output structure 50.
As shown in fig. 1, 2, 4 and 5, the three-stage planetary gear assembly 30 further includes three third-stage planetary gears 33, the planetary gear speed reducing mechanism further includes a second ring gear 60 and a first bearing structure 70. Wherein, the three third stage planetary gears 33 are engaged with the second ring gear 60, and the second ring gear 60 is connected with the first ring gear 40. The first bearing structure 70 is located between the third stage carrier 32 and the second ring gear 60 to support the third stage carrier 32. Like this, at third level planet carrier 32 rotation in-process, first bearing structure 70 supports third level planet carrier 32, and then makes third level planet carrier 32 drive output structure 50's rotation more steady, has promoted planetary gear reduction's operation stationarity, guarantees that planetary gear reduction can drive smoothly and treats the decelerator operation.
Specifically, the first ring gear 40 is connected with the second ring gear 60, the power output end is connected with the first sun gear to drive the first sun gear to rotate, and the first sun gear is engaged with all three first-stage planetary gears 11 to drive all the first-stage planetary gears 11 to rotate. Each first-stage planetary gear 11 is pivotally mounted on the first-stage planetary disk 12, and in the process that each first-stage planetary gear 11 rotates along the first inner gear ring 40, the three first-stage planetary gears 11 drive the first-stage planetary disk 12 to rotate, and the first-stage planetary disk 12 is fixedly connected with the second sun gear 22 and drives the second sun gear 22 to rotate. The second sun gear 22 is engaged with all of the three second-stage planetary gears 21 to rotate each of the second-stage planetary gears 21. Each second-stage planetary gear 21 can be pivotally mounted on the second-stage planetary disk 23 to drive the second-stage planetary disk 23 to rotate, and the second-stage planetary disk 23 is fixedly connected with the third sun gear 31 and drives the third sun gear 31 to rotate. Each third-stage planetary gear 33 is pivotally mounted on the third-stage planetary carrier 32, the third sun gear 31 is engaged with the three third-stage planetary gears 33 to drive each third-stage planetary gear 33 to rotate, and the three third-stage planetary gears 33 rotate along the circumferential direction of the second ring gear 60 to drive the third-stage planetary carrier 32 to rotate, so that the rotation of the output structure 50 is realized.
As shown in fig. 1, 3 and 5, the planetary gear reduction mechanism further includes a second bearing structure 80. Wherein the second bearing structure 80 is located between the second ring gear 60 and the output structure 50 to support the output structure 50. Like this, at output structure 50 rotation in-process, second bearing structure 80 supports output structure 50, and then makes output structure 50's rotation more steady, has promoted planetary gear reduction's operating stability, guarantees that planetary gear reduction can drive steadily and waits the decelerator operation.
As shown in fig. 5, the third-stage planet carrier 32 further has a second recess 322, a first mounting cavity is formed between the second recess 322 and the second ring gear 60, and the first bearing structure 70 is located in the first mounting cavity. The output structure 50 has a third recess 51, a second mounting cavity is formed between the second recess 322 and the second ring gear 60, and the second bearing structure 80 is located in the second mounting cavity. Therefore, the arrangement makes the layout of the internal structure of the planetary gear speed reducing mechanism more compact, further reduces the overall height of the planetary gear speed reducing mechanism, and realizes the miniaturization design of the planetary gear speed reducing mechanism. Meanwhile, the arrangement makes the installation of the first bearing structure 70 and the second bearing structure 80 easier and simpler for workers, and reduces the installation difficulty.
As shown in fig. 2, the first bearing structure 70 includes a plurality of sets of first roller pairs that are arranged at intervals in the circumferential direction of the second ring gear 60. Each set of the first roller pairs includes a first sub roller 71 and a second sub roller 72, the first sub roller 71 extending in the axial direction of the second ring gear 60, and the second sub roller 72 extending in the radial direction of the second ring gear 60. Specifically, the first sub roller 71 and the second sub roller 72 are each a cylindrical structure. The first sub-rollers 71 and the second sub-rollers 72 in each set of first roller pairs are arranged in a crossed manner to support the third-stage planet carrier 32 in the axial direction and the radial direction, and compared with the bearing structure in the prior art, an inner ring and an outer ring are omitted, so that the overall occupied space of the first bearing structure 70 is reduced, and the internal structure of the planetary gear speed reducing mechanism is more compact.
As shown in fig. 3, the second bearing structure 80 includes a plurality of sets of second roller pairs that are arranged at intervals in the circumferential direction of the second ring gear 60, each set of second roller pairs including a third sub roller 81 and a fourth sub roller 82, the third sub roller 81 extending in the axial direction of the second ring gear 60, and the fourth sub roller 82 extending in the radial direction of the second ring gear 60. Specifically, the third sub roller 81 and the fourth sub roller 82 are each a cylindrical structure. The third sub-roller 81 and the fourth sub-roller 82 in each set of second roller pairs are arranged in a crossed manner to support the output structure 50 in the axial direction and the radial direction, and compared with the bearing structure in the prior art, an inner ring and an outer ring are omitted, so that the overall occupied space of the second bearing structure 80 is reduced, and the internal structure of the planetary gear speed reducing mechanism is more compact.
As shown in fig. 1, the first-stage planetary plate 12 has a first mounting hole, the inner surface of the first mounting hole has a first tooth-shaped portion 121, the second sun gear 22 is inserted into the first mounting hole, and the tooth portion of the second sun gear 22 is attached to the first tooth-shaped portion 121. The second stage planetary disk 23 has a second mounting hole, the inner surface of the second mounting hole has a second toothed portion 231, the third sun gear 31 is inserted into the second mounting hole, and the toothed portion of the third sun gear 31 is attached to the second toothed portion 231. Therefore, the arrangement realizes the rotation stopping matching of the first-stage planetary disk 12 and the second sun gear 22 as well as the second-stage planetary disk 23 and the third sun gear 31, the processing of the first-stage planetary disk 12 and the second-stage planetary disk 23 is easier and simpler, and the overall processing cost of the planetary gear speed reducing mechanism is reduced. Meanwhile, the structure is simple, and the processing and the realization are easy.
As shown in fig. 1, the planetary gear reduction mechanism further includes an oil seal 90. Wherein, the oil seal 90 is arranged between the second ring gear 60 and the output structure 50 to seal the joint of the two and prevent impurities such as dust from entering the planetary gear speed reducing mechanism.
From the above description, it can be seen that the above-mentioned embodiments of the present invention achieve the following technical effects:
the power output end is connected with the first sun gear to drive the first sun gear to rotate, and the first sun gear is meshed with the first-stage planetary gears to drive the first-stage planetary gears to rotate. Each first-stage planetary gear can be pivotally arranged on the first-stage planetary disc, and in the process that each first-stage planetary gear rotates along the first inner gear ring, the plurality of first-stage planetary gears drive the first-stage planetary discs to rotate, and the first-stage planetary discs are fixedly connected with the second sun gear and drive the second sun gear to rotate. The second sun gear is meshed with the plurality of second-stage planetary gears to drive the second-stage planetary gears to rotate. Each second-stage planetary gear can be pivotally arranged on the second-stage planetary disc to drive the second-stage planetary disc to rotate, and the second-stage planetary disc is fixedly connected with the third sun gear and drives the third sun gear to rotate. Therefore, in the running process of the planetary gear speed reducing mechanism, the first-stage planetary disk is limited only by the second sun gear in the radial direction, the second-stage planetary disk is limited only by the third sun gear in the radial direction, after the assembly of the planetary gear speed reducing mechanism is completed, the first-stage planetary disk and the second-stage planetary disk are limited in the axial direction through the stacking of the baffle cover, the first-stage planetary gear, the second-stage planetary gear and the third-stage planetary disk, and then the floating installation of the first-stage planetary disk and the second-stage planetary disk is realized, so that the assembly of the planetary gear speed reducing mechanism is easier and simpler, the problem that the assembly precision requirement of a planetary speed reducer in the prior art is higher is further solved, the labor intensity of workers is increased, and the assembly period of the planetary gear speed reducer is shortened. Meanwhile, the first-stage planetary gear and the second-stage planetary gear are meshed with the first inner gear ring, namely the first inner gear ring and the second inner gear ring share the first inner gear ring, so that the overall height of the planetary gear speed reducing mechanism is reduced, and the miniaturization design is realized.
It is obvious that the above described embodiments are only some of the embodiments of the present invention, and not all of them. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts shall belong to the protection scope of the present invention.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular is intended to include the plural unless the context clearly dictates otherwise, and it should be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of features, steps, operations, devices, components, and/or combinations thereof.
It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are capable of operation in sequences other than those illustrated or described herein.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A planetary gear reduction comprising a primary planetary gear assembly (10), a secondary planetary gear assembly (20) and a tertiary planetary gear assembly (30), characterized in that it further comprises:
a first ring gear (40), a plurality of first stage planet gears (11) of the primary planet gear assembly (10) and a plurality of second stage planet gears (21) of the secondary planet gear assembly (20) are all meshed with the first ring gear (40);
the primary planetary gear assembly (10) comprises a first sun gear and a first-stage planetary disk (12), the first sun gear is meshed with the plurality of first-stage planetary gears (11) to drive the first-stage planetary gears (11) to rotate, and the first-stage planetary gears (11) are pivotally arranged on the first-stage planetary disk (12);
the secondary planetary gear assembly (20) comprises a second sun gear (22) and a second-stage planetary disk (23), the second sun gear (22) is fixedly connected with the first-stage planetary disk (12), the first-stage planetary disk (12) drives the second sun gear (22) to rotate, the second sun gear (22) is meshed with the plurality of second-stage planetary gears (21) to drive the second-stage planetary gears (21) to rotate, and the second-stage planetary gears (21) are pivotally mounted on the second-stage planetary disk (23);
the three-stage planetary gear assembly (30) comprises a third sun gear (31) and a third-stage planet carrier (32), the third sun gear (31) is fixedly connected with the second-stage planet disc (23), and the second-stage planet disc (23) drives the third sun gear (31) to rotate.
2. A planetary gear reduction according to claim 1, wherein the primary planetary gear assembly (10), the secondary planetary gear assembly (20) and the tertiary planetary gear assembly (30) are sequentially spaced along the height direction of the planetary gear reduction, and the primary planetary disk (12) is located within the first annulus gear (40) and between the adjacent primary planetary gear (11) and the second planetary gear (21).
3. A planetary gear reduction mechanism according to claim 1, wherein the third stage planet carrier (32) has a first recess (321), the second stage planet disc (23) being located within the first recess (321).
4. The planetary gear reduction mechanism according to claim 1, further comprising:
and the output structure (50), the third-stage planet carrier (32) is connected with the output structure (50) through a fastener, and the power of the planetary gear speed reducing mechanism is output through the output structure (50).
5. A planetary gear reduction mechanism according to claim 4, wherein the three-stage planetary gear assembly (30) further comprises a plurality of third stage planetary gears (33), the planetary gear reduction mechanism further comprising:
a second ring gear (60), a plurality of the third stage planetary gears (33) being engaged with the second ring gear (60), the second ring gear (60) being connected with the first ring gear (40);
a first bearing structure (70), the first bearing structure (70) being located between the third stage planet carrier (32) and the second ring gear (60) to support the third stage planet carrier (32).
6. The planetary gear reduction mechanism according to claim 5, further comprising:
a second bearing structure (80), the second bearing structure (80) being located between the second ring gear (60) and the output structure (50) to support the output structure (50).
7. The planetary gear reduction mechanism according to claim 6,
the third-stage planet carrier (32) is also provided with a second concave part (322), a first mounting cavity is formed between the second concave part (322) and the second inner gear ring (60), and the first bearing structure (70) is positioned in the first mounting cavity;
the output structure (50) is provided with a third concave part (51), a second mounting cavity is formed between the second concave part (322) and the second inner gear ring (60), and the second bearing structure (80) is located in the second mounting cavity.
8. A planetary gear reduction mechanism according to claim 5, wherein the first bearing structure (70) comprises a plurality of sets of first roller pairs, the plurality of sets of first roller pairs being spaced circumferentially of the second annulus gear (60); each set of the first roller pairs includes a first sub roller (71) and a second sub roller (72), the first sub roller (71) extending in an axial direction of the second ring gear (60), the second sub roller (72) extending in a radial direction of the second ring gear (60).
9. The planetary gear reduction mechanism according to claim 6, wherein the second bearing structure (80) comprises a plurality of sets of second roller pairs, the plurality of sets of second roller pairs being disposed at intervals along a circumferential direction of the second ring gear (60), each set of the second roller pairs comprising a third sub roller (81) and a fourth sub roller (82), the third sub roller (81) extending in an axial direction of the second ring gear (60), the fourth sub roller (82) extending in a radial direction of the second ring gear (60).
10. The planetary gear reduction mechanism according to claim 1,
the first-stage planetary plate (12) is provided with a first mounting hole, the inner surface of the first mounting hole is provided with a first tooth-shaped part (121), the second sun gear (22) penetrates through the first mounting hole, and the tooth part of the second sun gear (22) is attached to the first tooth-shaped part (121);
the second-stage planetary plate (23) is provided with a second mounting hole, the inner surface of the second mounting hole is provided with a second toothed portion (231), the third sun gear (31) penetrates through the second mounting hole, and the tooth portion of the third sun gear (31) is attached to the second toothed portion (231).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921793239.3U CN210889936U (en) | 2019-10-23 | 2019-10-23 | Planetary gear speed reducing mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921793239.3U CN210889936U (en) | 2019-10-23 | 2019-10-23 | Planetary gear speed reducing mechanism |
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| Publication Number | Publication Date |
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| CN210889936U true CN210889936U (en) | 2020-06-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921793239.3U Active CN210889936U (en) | 2019-10-23 | 2019-10-23 | Planetary gear speed reducing mechanism |
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| CN (1) | CN210889936U (en) |
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2019
- 2019-10-23 CN CN201921793239.3U patent/CN210889936U/en active Active
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